You can't blame him due to the nature of his work, they would have been oriented against bitcoin since the financial apex institution he works with is the one in control of every other banks and are the same people who established the law that all banks should not be involved in anything related to cryptocurrency as against their ethics as financial institutions, but also i think there's more need to emphasize on the aspect of bitcoin being a p2p network, how he can make use of a decentralized cold storage for privacy, he may actually finds it more interesting if this aspect were cleared and his fear from avoiding his work place know about his involvements in bitcoin will be secured along way.